5. Summarize your conclusions from the TLC simulator. Circle the correct answer in each description about TLC separation of organic compounds on silica gel plates. a) A more polar compound has a lower/higher retention factor. b) A less polar compound has a lower/higher retention factor. c) A more polar solvent causes a lower/higher retention factor. d) A less polar solvent causes a lower/higher retention factor. e) To increase the retention factor of a spot, you should add more ethyl acetate/hexane.

Principles of Instrumental Analysis
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ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
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Chapter27: Gas Chromatography
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Problem 27.4QAP
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5. Summarize your conclusions from the TLC simulator. Circle the correct answer in each description about TLC
separation of organic compounds on silica gel plates.
a) A more polar compound has a lower/higher retention factor.
b) A less polar compound has a lower/higher retention factor.
c) A more polar solvent causes a lower/higher retention factor.
d) A less polar solvent causes a lower/higher retention factor.
e) To increase the retention factor of a spot, you should add more ethyl acetate/hexane.
Transcribed Image Text:5. Summarize your conclusions from the TLC simulator. Circle the correct answer in each description about TLC separation of organic compounds on silica gel plates. a) A more polar compound has a lower/higher retention factor. b) A less polar compound has a lower/higher retention factor. c) A more polar solvent causes a lower/higher retention factor. d) A less polar solvent causes a lower/higher retention factor. e) To increase the retention factor of a spot, you should add more ethyl acetate/hexane.
Expert Solution
Step 1

A) A more polar compound has a lower retention factor. Because the silica plate is polar. As polar likes polar. So it does not move forward.

B) A less polar compound has a higher retention factor because non-polar compounds does not form any interaction with silica. So they move with solvent.

C) A more polar solvent causes a higher retention factor because the compound get higher solubilized in polar solvent and move with polar solvent.

 

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